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You searched for: mediatype:texts AND collection:penn_state_univ AND subject:"Coal Mines And Mining Pennsylvania Windber."
[texts]Feasibility study and supplement : demonstration mine, using longwall mining techniques, Windber, Somerset County, Pennsylvania / [Allison L. Bayles - Allison L. Bayles & Associates, Pittsburgh, Pa
Prepared for the Economic Development Administration under AF-30, Contract Cc-6114
Keywords: Coal mines and mining Pennsylvania Windber
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